Utilization of protopine and related alkaloids. XI. Photolysis of 7,8-dimethoxy-2-methyl-3-(4',5'-methylenedioxy-2'-vinylphenyl)isocarbostyril and its application to the preparation of oxychelerythrines.
Intermolecular benzyne cycloaddition (IBC), a versatile approach to benzophenanthridine antitumor alkaloids. Formal synthesis of nitidine and chelerythrine
作者:Gloria Martin、Enrique Guitian、Luis Castedo、Jose M. Saa
DOI:10.1021/jo00048a024
日期:1992.10
A new approach to the synthesis of benzophenanthridine alkaloids is described which is based on cycloaddition of arynes to pyrrolinediones, the pyrrolinediones behaving as aza diene equivalents. The synthesis of 2,3,8,9-substituted benzophenanthridines and the regioselective synthesis of a 2,3,7,8-substituted benzophenanthridine were performed. The formal synthesis of chelerythrine and the antitumor alkaloid nitidine is described.
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